格式:series[(判斷條件1)&(判斷條件2)|(判斷條件3)]
只要返回值是bool型就可用做篩選:series[bool]
課上練習:
求篩選以'張'開頭的序列
s=Series(["張3","張4","王5","趙6"],index=['a','b','c','d'])
In:s.str.startswith("張")
Out:
a 張3 b 張4 dtype: object
#startswith中間有個s,startswith中間有個s,startswith中間有個s